Press-Fit Piston Pin

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

The piston and connecting rod are to be serviced as an assembly. If a new piston or connecting rod is required, a complete piston/connecting rod assembly must be used.
New connecting rod nuts must be used during assembly.

Install the piston rings (121) onto the piston.

Fig 1: View Of Piston & Connecting Rod Components

GM1310003

Courtesy of GENERAL MOTORS CORP.

NOTE: Use a piston ring expander to install the piston rings. The rings may be damaged if expanded more than necessary.

Install the lower oil control piston ring spacer onto the piston.

Fig 2: View Of Lower Oil Control Piston Ring Spacer

GM562836

Courtesy of GENERAL MOTORS CORP.

Install the lower oil control piston ring onto the piston (1).

Fig 3: View Of Lower Oil Control Piston Ring

GM562842

Courtesy of GENERAL MOTORS CORP.

Install the upper oil control piston ring onto the piston (1).

Fig 4: View Of Upper Oil Control Piston Ring

GM562839

Courtesy of GENERAL MOTORS CORP.

Space the oil control piston ring end gaps a minimum of 90 degrees apart (1, 2, 3).

Fig 5: View Of Oil Control Piston Rings

GM562848

Courtesy of GENERAL MOTORS CORP.

Install the lower compression piston ring onto the piston (1). The mark on the side of the piston ring should face the top of the piston.

Fig 6: View Of Lower Compression Piston Ring Mark

GM562823

Courtesy of GENERAL MOTORS CORP.

Install the upper compression piston ring onto the piston. The mark (1) on the side of the piston ring should face the top of the piston.

Fig 7: View Of Upper Compression Piston Ring Mark

GM562819

Courtesy of GENERAL MOTORS CORP.

Space the compression piston ring end gaps 120 degrees apart.